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Finding the Fourth Proportional to 3,390.95, 5,086.49 and 926.03

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Solution

The fourth proportional to 3,390.95, 5,086.49 and 926.03 is: 1,389.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.95 : 5,086.49 = 926.03 : x
  2. Step 2: Convert to fraction form
    3,390.95/5,086.49 = 926.03/x
  3. Step 3: Cross multiply
    3,390.95x = 5,086.49 × 926.03
  4. Step 4: Simplify right side
    3,390.95x = 4,710,242.33
  5. Step 5: Solve for x
    x = 4,710,242.33/3,390.95
  6. Step 6: Final answer
    x = 1,389.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.